From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2EF13C25B78 for ; Tue, 28 May 2024 06:55:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:References:Cc:To:Subject:From: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=LhoBNI9/R50mzxqYdKsxYgG7lZ43OM45GItQIsPI4u8=; b=i6vCJ+z1IrB6uK bEK3Ipd4xLUScKEByI7ZTcc90miAK2KwRXIUKzaAUCHZLSWjvftRlDxMleVEG+5ZxfU+q1ussqdtv DmF21IuJS3HnaBh3Yqnx042+w5bJ70BhUULqLNKkCE3blDJ2zwXjnlBa+qaoQH1c/fTcZrXMcr7J1 nK7MfjPGh6QbETWhpXYyy2HriaXTpcYo9qpQzeFx0wGHYTDycS7eA+ovNR+18fqYFyeQOVW2JoFM+ 0tZ7ijOFsr+bFoyxD/lIqt81jLmy4mUpYFHvmvt2iGBziGvVkHe4eWb0R8dpTdv5A4uceL+y+5R1H GSVeFucUnyPNysg8et1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBqk5-0000000HFWz-2rN7; Tue, 28 May 2024 06:55:29 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sBqk1-0000000HFVM-3Jpp for linux-arm-kernel@lists.infradead.org; Tue, 28 May 2024 06:55:27 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 88109339; Mon, 27 May 2024 23:55:43 -0700 (PDT) Received: from [10.162.40.16] (a077841.arm.com [10.162.40.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 77D173F792; Mon, 27 May 2024 23:55:11 -0700 (PDT) Message-ID: <4f7d8691-fe19-4e8a-95e5-9f7680c82021@arm.com> Date: Tue, 28 May 2024 12:24:57 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Amit Daniel Kachhap Subject: Re: [PATCH v4 13/29] arm64: convert protection key into vm_flags and pgprot values To: Joey Gouly , linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, maz@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev References: <20240503130147.1154804-1-joey.gouly@arm.com> <20240503130147.1154804-14-joey.gouly@arm.com> Content-Language: en-US In-Reply-To: <20240503130147.1154804-14-joey.gouly@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240527_235525_900349_3D22CDD3 X-CRM114-Status: GOOD ( 14.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 5/3/24 18:31, Joey Gouly wrote: > Modify arch_calc_vm_prot_bits() and vm_get_page_prot() such that the pkey > value is set in the vm_flags and then into the pgprot value. > > Signed-off-by: Joey Gouly > Cc: Catalin Marinas > Cc: Will Deacon > --- > arch/arm64/include/asm/mman.h | 8 +++++++- > arch/arm64/mm/mmap.c | 9 +++++++++ > 2 files changed, 16 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/include/asm/mman.h b/arch/arm64/include/asm/mman.h > index 5966ee4a6154..ecb2d18dc4d7 100644 > --- a/arch/arm64/include/asm/mman.h > +++ b/arch/arm64/include/asm/mman.h > @@ -7,7 +7,7 @@ > #include > > static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, > - unsigned long pkey __always_unused) > + unsigned long pkey) > { > unsigned long ret = 0; > > @@ -17,6 +17,12 @@ static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, > if (system_supports_mte() && (prot & PROT_MTE)) > ret |= VM_MTE; > > +#if defined(CONFIG_ARCH_HAS_PKEYS) Should there be system_supports_poe() check like above? Thanks, Amit > + ret |= pkey & 0x1 ? VM_PKEY_BIT0 : 0; > + ret |= pkey & 0x2 ? VM_PKEY_BIT1 : 0; > + ret |= pkey & 0x4 ? VM_PKEY_BIT2 : 0; > +#endif > + > return ret; > } > #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) > diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c > index 642bdf908b22..86eda6bc7893 100644 > --- a/arch/arm64/mm/mmap.c > +++ b/arch/arm64/mm/mmap.c > @@ -102,6 +102,15 @@ pgprot_t vm_get_page_prot(unsigned long vm_flags) > if (vm_flags & VM_MTE) > prot |= PTE_ATTRINDX(MT_NORMAL_TAGGED); > > +#ifdef CONFIG_ARCH_HAS_PKEYS > + if (vm_flags & VM_PKEY_BIT0) > + prot |= PTE_PO_IDX_0; > + if (vm_flags & VM_PKEY_BIT1) > + prot |= PTE_PO_IDX_1; > + if (vm_flags & VM_PKEY_BIT2) > + prot |= PTE_PO_IDX_2; > +#endif > + > return __pgprot(prot); > } > EXPORT_SYMBOL(vm_get_page_prot); _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel